Brian Galvin, Veritas Prep's Director of Academic Programs, shows you the common traps that people fall into when solving tricky Data Sufficiency questions. The GMAT tests are as easy as you know it but a lot of students fail to score sufficiently because of the tricky approach to the questions. In this video tutorial, you will learn how to be better at knowing the tricks and dealing with them in different ways.
Source: GMAT Prep
Free GMAT resources http://www.veritasprep.com/gmat-mba-resources/